Thanks to the economic crisis, unfortunately most people now know what a trillion is, but we thought we'd put it in here just so you can enjoy the sheer optical impact of all those zeros: 1 000 000 000 000. Also, this is limited to areas where the United States nomenclature is used (which is most of finance), other countries and systems might refer to this same number of zeros (12) as a billion, and account for a U.S. billion as a "milliard" (9 zeros).